JP6576233B2 - Protective structure of conductive part - Google Patents

Description

  The present invention relates to a protective structure for a conductive portion in a power distribution device.

  In a DC circuit in a photovoltaic power generation system or the like, a 3-pole or 4-pole breaker is provided to cope with a high voltage, and one power supply side terminal and the other load side terminal of the two poles are connected in series by a cable. By connecting to the so-called (so-called hook wiring), the load per one pole when the breaker is opened and closed is reduced.

  Here, in order to cope with a high voltage, it is necessary to increase the diameter of the cable, and this makes the cable bending work difficult when staking wiring, and because the cable has a large diameter, the installation space of the breaker There was a problem that would become larger.

  Therefore, in the past, a copper bar was used in place of the cable, but a shield plate was provided on the front side of the power distribution equipment in order to protect the conductive part from being touched by human hands. (Patent Document 1). For this reason, it is necessary to remove the shield plate each time during the construction of the breaker or during maintenance and inspection, resulting in poor workability.

JP-A-8-182124

  The object of the present invention is to solve the above-mentioned conventional problems, and to provide a protective structure for a conductive part that does not require removal of the shield plate each time during construction or maintenance inspection even when connecting with a copper bar. is there.

  The present invention made in order to solve the above-mentioned problems is a power distribution device composed of at least three poles, a base on which the power distribution device is placed, a side of the base, and the power distribution A copper bar that connects one power supply side terminal and the other load side terminal of the two poles of the device, and an insulating plate that covers the front side of the copper bar is fixed to the base. It is.

  According to a second aspect of the present invention, in the protective structure for a conductive portion according to the first aspect, the insulating plate is provided between the power distribution device and the base, and an end portion of the insulating plate is directed outward of the power distribution device. The extended part covers the front side of the copper bar.

  According to a third aspect of the present invention, in the protective structure for a conductive portion according to the second aspect, the copper bar has left and right pieces extending in the left-right direction of the power distribution device, and the insulating plate has a front side of the left and right pieces. The overhanging part which covers is formed.

  In the protective structure for a conductive portion according to the present invention, an insulating plate covering the front side of a copper bar disposed along the side of the base is fixed to the base. This makes it possible to protect the conductive part on which the copper bar is provided by the insulating plate even when the wiring is done with the copper bar, so that it is necessary to provide a shield plate on the front side of the power distribution device as in the past. As a result, workability during construction and maintenance inspections is greatly improved.

  According to the invention which concerns on Claim 2, an insulating board shall be provided between a power distribution apparatus and a base, and also the extension part which extended the edge part of this insulating board to the outer side direction of a power distribution apparatus WHEREIN: It covers the front side. Here, in particular, when a high voltage is input, a short-circuit arc may occur between the power distribution device and the base, and thus an insulating plate is conventionally provided between the two. Therefore, a simple structure and shape of extending the insulating plate provided conventionally by adopting a structure in which the copper bar is protected by the extended portion in which the end portion of the insulating plate is expanded as in claim 2. Thus, the conductive part can be protected.

  According to the invention according to claim 3, by protecting the front side of the left and right pieces of the copper bar with the overhang formed on the insulating plate, it is possible to protect the portion that cannot be protected by the terminal cover, and connect to the power distribution equipment. It is possible to insulate the cable between the left and right pieces of the copper bar.

It is a whole perspective view which shows this embodiment. It is the perspective view which looked at FIG. 1 from another angle. It is a general view which shows a connection box. It is a perspective view which shows a copper bar. It is a bottom view of the output breaker. It is a perspective view which shows an insulating plate. It is the perspective view which provided the terminal cover. It is a front view of the output breaker. FIG. 6 is a cross-sectional view showing a second embodiment. FIG. 6 is a cross-sectional view showing a third embodiment.

Preferred embodiments of the present invention are shown below. In addition, in this specification, up and down, left and right, and front and rear refer to the directions shown in FIG.
(Embodiment 1)
1 and 2 show an output breaker 1 which is a power distribution device mounted on the base 2, and this output breaker 1 is shown in FIG. 3 by a fixing hole 3 formed in the base 2. Thus, it attaches on the apparatus attachment board 5 provided in the connection box 4 in a solar power generation system. Reference numeral 6 denotes an input switch inputted from a solar battery. In the present embodiment, by arranging the base 2, the power supply side terminal 7, the load side terminal 8 and the copper bar 9 described later between the output breaker 1 to which a high voltage is input, and the device mounting plate 5 are disposed. The insulation distance is to be secured. It is also possible to use a switch as the power distribution device.

  As shown in FIG. 1 and FIG. 2, the output breaker 1 shown in this embodiment is composed of four poles, and in order to cope with a high voltage, one power supply side terminal 7a and the other load of the right two poles. The side terminal 8a is connected by a copper bar 9 (so-called hooked wiring) to reduce the load per one pole when the output breaker 1 is opened and closed. Similarly, one power supply side terminal 7 b and the other load side terminal 8 b of the left two poles are connected by a copper bar 9.

  As shown in FIG. 4, the copper bar 9 includes a terminal piece 10 that extends horizontally from the power supply side terminal 7 and the load side terminal 8, a depth piece 11 that extends substantially rearward from the end of the terminal piece 10, and a depth piece, respectively. The left and right pieces 12 are bent approximately 90 ° in the left and right outer directions from the end portions of the left and right ends, and the side pieces 13 that connect the left and right pieces 12 with each other in the vertical direction. The copper bar 9 has an integral structure formed by bending a metal plate in the same plane. And the side piece 13 is arrange | positioned along the side of the base 2 like FIG.1 and FIG.2.

  Here, as shown in FIG. 5, a resin insulating plate 14 is provided between the output breaker 1 and the base 2. The insulating plate 14 is formed with a fixing hole 15 for fixing to the base 2 as shown in FIG. 6, and the fixing hole 16 formed in the output breaker 1 in FIG. By inserting a screw into the hole 15 and fastening them together, the output breaker 1 and the insulating plate 14 are fixed to the base 2. This insulating plate 14 is disposed between the two since the short circuit arc may occur between the output breaker 1 and the base 2 particularly when a high voltage is input. is there.

  As shown in FIGS. 1, 2, and 6, the insulating plate 14 has an extended portion 17 whose end is expanded in the outer direction of the output breaker 1, and the front of the left and right pieces 12 formed on the copper bar 9. It has the overhang | projection part 18 formed so that covering was possible. Here, the front side of the side piece 13 constituting the copper bar 9, that is, the front side is covered by the extending portion 17 of the insulating plate 14, and further, the overhanging portion 18 formed on the insulating plate 14 further covers the copper bar 9. The front side of the left and right pieces 12 was protected. The power supply side terminal 7 and the load side terminal 8 are each covered with a terminal cover 19 as shown in FIG. 7 to cover the front side of the terminal piece 10 and the depth piece 11 of the copper bar 9. Thus, in this embodiment, it is set as the structure which covers the front side of the left-right piece 12 and the side piece 13 with the insulating board 14, and covers the front side of the terminal piece 10 and the depth piece 11 with the terminal cover 19, and the front of the copper bar 9 The side is to be fully protected.

  As described above, by fixing the insulating plate 14 covering the front side of the copper bar 9 to the base 2, the conductive portion in which the copper bar 9 is provided by the insulating plate 14 even when the wiring by the copper bar 9 is performed. Therefore, there is no need to provide a shield plate on the front side of the power distribution device as in the prior art, and the workability during construction and maintenance inspection is greatly improved. That is, when the screw for fixing the copper bar 9 to the power supply side terminal 7 and the load side terminal 8 is tightened with the output breaker 1 turned off, it is not necessary to remove the shield plate that has been used so far. Workability will be good.

  Moreover, the end of the insulating plate 14 conventionally provided between the output breaker 1 and the base 2 is configured by protecting the front side of the side piece 13 of the copper bar 9 with the extended portion 17. The conductive portion can be protected with a simple configuration and shape in which the portion is expanded. Further, by covering the front side of the left and right pieces 12 with the overhanging portion 18, a portion that cannot be protected by the terminal cover 19 (that is, the front side of the left and right pieces 12) can be protected and connected to the output breaker 1. The cable and the left and right pieces 12 of the copper bar 9 can be insulated.

  As shown in FIG. 6, the insulating plate 14 is divided into two in the vertical direction. Thereby, when installing the output breaker 1 in a state where the copper bar 9 is already attached to the base 2, there is no interference by the copper bar 9 as compared with the case where the insulating plate 14 is constituted by one piece, The workability of attaching the insulating plate 14 is high. The dividing direction of the insulating plate 14 may be the left-right direction.

  Further, in this embodiment, taking the right two poles as an example, the power supply side terminal 7a on the center side of the output breaker 1 and the load side terminal 8a on the outside of the output breaker are connected by copper bars 9 and wired. Therefore, the lengths of the left and right pieces 12 of the copper bar 9 are different between the upper and lower sides. Therefore, the left and right widths of the overhanging portion 18 covering the front side of the left and right pieces 12 are also correspondingly different from each other in the vertical direction as shown in FIG. 8, and the crimp terminal of the cable connected to the outer power supply side terminal 7a ′. And the left and right pieces 12 of the copper bar 9 are insulated. However, for example, when a sufficient insulation distance can be ensured between the crimping terminal of the cable connected to the outer power supply side terminal 7a ′ and the left and right pieces 12, the insulating plate 14 divided into two in the vertical direction is used. The power supply side and the load side may be of the same shape, and the number of parts can be reduced.

  As described above, the present embodiment has been described using the output breaker 1 composed of four poles. However, the output breaker 1 composed of three poles may be used, and in this case as well. Of the two poles, one power supply side terminal 7 and the other load side terminal 8 may be connected by a copper bar 9 to reduce the load per pole.

(Embodiment 2)
As shown in FIG. 9, the outer end portion of the extending portion 17 of the insulating plate 14 may be further bent in the depth direction. With such a structure, the side of the copper bar 9 can be protected in addition to the front side of the copper bar 9.

(Embodiment 3)
In the first and second embodiments, the insulating plate 14 is fixed between the base 2 and the insulating plate 20 having a substantially L-shaped cross section, as in the third embodiment shown in FIG. It can also be set as the structure which covers the front side of the copper bar 9 by fixing to the stand 2. FIG. In this case, a separate insulating plate 14 may be provided between the output breaker 1 and the base 2 as in the conventional case. With such a structure, the insulating plate 20 is also interposed between the copper bar 9 and the base 2, and both can be insulated.

DESCRIPTION OF SYMBOLS 1 Output breaker 2 Base 3 Fixing hole 4 Connection box 5 Equipment mounting plate 6 Input switch 7 Power supply side terminal 8 Load side terminal 9 Copper bar 10 Terminal piece 11 Depth piece 12 Left and right piece 13 Side piece 14 Insulating plate 15 Fixed hole 16 Fixed hole 17 Extended portion 18 Overhang portion 19 Terminal cover 20 Insulating plate

Claims (3)

Power distribution equipment comprising at least three poles;
A base on which this power distribution device is placed;
It is arranged along the side of this base, and comprises a copper bar that connects one power supply side terminal and the other load side terminal among the two poles of the power distribution equipment,
A protective structure for a conductive portion, wherein an insulating plate covering the front side of the copper bar is fixed to the base. While providing the insulating plate between the power distribution equipment and the base,
2. The conductive portion protection structure according to claim 1, wherein the front side of the copper bar is covered with an extending portion obtained by extending an end portion of the insulating plate in an outer direction of the power distribution device. The copper bar shall have left and right pieces extending in the left and right direction of the power distribution equipment,
3. The protective structure for a conductive portion according to claim 2, wherein an overhanging portion is formed on the insulating plate to cover the front side of the left and right pieces.